William F. Pokorny wrote:
> 
> If I write the filter myslef, I am pretty sure I need to figure out the
> minimum intensity of color I can keep in the RGB ratios which best match the
> wavelength of the real color? Am I off track?

I hate to tell you this, but I really have no idea ^^;

What you need here is some kind of yellow filter that lets yellow pass 
through unaltered but mostly blocks other colors of light, and I'm not 
really sure how you would simulate this in POV-Ray post-processing.

Depending on how well POV-Ray simulates light frequencies (something 
which might make a good POV 4 feature request, as it would replace the 
presently-hacky photon dispersion, allow for more realistic light 
scattering in atmosphere, allow for more controllable irridescence, and 
so on, but I digress) you could try making all the lights strongly 
yellowish and see if you get the proper effect.. but I suspect you won't.

-Xplo

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